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RoHS Compliant Single Mode SFP Transceiver for GbE and Fiber
Channel
FEATURES
Description
The LCP-1250B4QDRx series are hot
pluggable 3.3V Small-Form-Factor transceiver
modules designed expressly for high-speed
communication applications that require rates up
to 1.25Gb/s. The transceiver is data rate
transparent, which means it can support GbE
(1.25Gb/s) as well as 1x Fiber channel
(1.062Gb/s) operations
The LCP-1250B4QDRx series are designed
to be compliant with SFP Multi-source Agreement
(MSA). Digital diagnostic monitoring functions
(Temperature, V
bias current, and RX received optical power)
compliant with SFF-8472 are also available. See
order information for details.
The post-amplifier of the LCP-1250B4QDRx
series also includes a Loss of Signal (LOS) circuit
that provides a TTL logic-high output when the
received optical level is below a preset LOS
Assert threshold.
, TX optical power, TX laser
CC
z Compliant with SFP Transceiver SFF-8472
MSA specification with internal calibration
z Compliant with Specifications for IEEE
802.3z/Gigabit Ethernet
z LCP-125B4QDRx compliant with the
1.0625GBd Fiber Channel 100-SM-LC-L FC-PI
Rev.13
z Single + 3.3V Power Supply and TTL Logic
Interface
z EEPROM with Serial ID Functionality
z Laser Class 1 Product which comply with the
requirements of IEC 60825-1 and IEC 60825-2
z Duplex LC Connector interface
Applications
z Gigabit Ethernet
z Switch to Switch interface
z Switched backplane applications
z File server interface
Performance
z LCP-1250B4QDRx: 1310nm FP laser, 10.5dB
link budget (10km)
DELTA ELECTRONICS, INC.
1 2008/1/23
Rev. 6G
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Absolute Maximum Ratings
Parameter Symbol Min. Typ. Max. Unit Note
Storage Temperature Ts -40 85 ºC
Supply Voltage VCC 0 5 V
Recommended Operating Conditions
Parameter Symbol Min. Typ. Max. Unit Note
Case Operating Temperature TC -5 70 ºC 1
Supply Voltage VCC 3.135 3.465 V
Relative Humidity (non condensation) - 5 85 %
Note 1: See order information
Electrical Characteristics
(VCC=3.3V ± 5%)
Parameter Symbol Min. Typ. Max. Unit Note
Total Supply Current ICCT 300 mA
Transmitter
Transmitter Differential Input Voltage VDT 0.5 2.4 V 1
Transmitter Disable Input-High V
Transmitter Disable Input-Low V
Transmitter Fault Pull up Resistor R
Transmitter Fault Output-High V
Transmitter Fault Output-Low V
Receiver
Receiver Differential Output Voltage VDR 0.35 2 V 3
Receiver LOS Load R
LOS Output Voltage-High V
LOS Output Voltage-Low V
Output Data Rise/Fall Time tr / tf 220 psec 4
Notes:
1. Internally AC coupled and terminated to 100Ohm differential load.
2 VCC+0.3 V
DISH
0 0.8 V
DISL
TX_FAULT
TXFH
TXFL
RXLOS
LOSH
LOSL
4.7 10 k 2
2 VCC+0.3 V 2
0 0.8 V 2
4.7 10 k 2
2 VCC+0.3 V 2
0 0.8 V 2
2. Pull up to V
on host Board
CC
3. Internally AC coupled, but requires a 100Ohm differential termination at or internal to Serializer/
Deserializer.
4. These are 20%~80% values
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Rev. 6G
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Optical Characteristics
(VCC=3.3V ± 5%, Data Rate=1250Mb/sec, PRBS=27-1 NRZ)
Parameter Symbol Min. Typ. Max. Unit Note
Transmitter
Output Optical Power (Avg.) PO
-9.5 -3
Optical Extinction Ratio 9 dB
Center Wavelength
Spectral Width (RMS)
Optical Rise/ Fall Time
λ
C
σ
260 psec 1
t
r/tf
1274 1310 1355 nm
4 nm
Receiver
Sensitivity (Avg.) PIN
Input Optical Wavelength
λ
LOS-Deasserted (Avg.) PA
-20
1270 1570 nm
-19
LOS-Asserted (Avg.) PD -36 dBm
LOS-Hysteresis PA-PD 0.5 dB
Overload PO
-3
dBm
Notes:
1. These are unfiltered 20%~80% values
2. The sensitivity is provided at a BER of 1×10
7
2
-1 PRBS and ER=9dB.
-12
or better with an input signal consisting of 1250Mb/s,
dBm
dBm 2
dBm
Mask of the eye diagram for the optical transmit signal
DELTA ELECTRONICS, INC.
3 2008/1/23
Rev. 6G
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SFP Transceiver Electrical Pad Layout
Pin Function Definitions
Pin Num. Name Function Plug Seq. Notes
1 VeeT Transmitter Ground 1
2 TX Fault Transmitter Fault Indication 3 Note 1
3 TX Disable Transmitter Disable 3
4 MOD-DEF2 Module Definition 2 3 Note 3, 2 wire serial ID interface
5 MOD-DEF1 Module Definition 1 3 Note 3, 2 wire serial ID interface
6 MOD-DEF0 Module Definition 0 3 Note 3, Grounded in Module
7 Rate Select Not Connect 3 Function not available
8 LOS Loss of Signal 3 Note 4
9 VeeR Receiver Ground 1 Note 5
10 VeeR Receiver Ground 1 Note 5
11 VeeR Receiver Ground 1 Note 5
12 RD- Inv. Received Data Out 3 Note 6
13 RD+ Received Data Out 3 Note 7
14 VeeR Receiver Ground 1 Note 5
15 VccR Receiver Power 2 3.3 ± 5%, Note 7
16 VccT Transmitter Power 2 3.3 ± 5%, Note 7
17 VeeT Transmitter Ground 1 Note 5
18 TD+ Transmit Data In 3 Note 8
19 TD- Inv. Transmit Data In 3 Note 8
20 VeeT Transmitter Ground 1 Note 5
Plug Seq.: Pin engagement sequence during hot plugging.
Note 2
Module disables on high or open
DELTA ELECTRONICS, INC.
4 2008/1/23
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Notes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10K resistor on
the host board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser
fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
2) TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the
module with a 4.7 – 10 K resistor. Its states are:
Low (0 – 0.8V): Transmitter on
(>0.8, < 2.0V): Undefined
High (2.0 – 3.465V): Transmitter Disabled
Open: Transmitter Disabled
3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K –
10Kresistor on the host board. The pull-up voltage shall be VccT or VccR (see Section IV for further
details). Mod-Def 0 is grounded by the module to indicate that the module is present Mod-Def 1 is the
clock line of two wire serial interface for serial ID Mod-Def 2 is the data line of two wire serial interface
for serial ID
4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10K
resistor. Pull up voltage between 2.0V and VccT, R+0.3V. When high, this output indicates the
received optical power is below the worst-case receiver sensitivity (as defined by the standard in use).
Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
5) VeeR and VeeT may be internally connected within the SFP module.
6) RD-/+: These are the differential receiver outputs. They are AC coupled 100 differential lines which
should be terminated with 100 (differential) at the user SERDES. The AC coupling is done inside the
module and is thus not required on the host board. The voltage swing on these lines will be between
370 and 2000 mV differential (185 – 1000 mV single ended) when properly terminated.
7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the
SFP connector pin. Maximum supply current is 300mA. Recommended host board power supply
filtering is shown below. Inductors with DC resistance of less than 1 ohm should be used in order to
maintain the required voltage at the SFP input pin with 3.3V supply voltage. When the recommended
supply-filtering network is used, hot plugging of the SFP transceiver module will result in an inrush
current of no more than 30mA greater than the steady state value. VccR and VccT may be internally
connected within the SFP transceiver module.
8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100
differential termination inside the module. The AC coupling is done inside the module and is thus not
required on the host board. The inputs will accept differential swings of 500 – 2400 mV (250 – 1200
mV single-ended), though it is recommended that values between 500 and 1200 mV differential (250 –
600 mV single-ended) be used for best EMI performance.
DELTA ELECTRONICS, INC.
5 2008/1/23
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Recommend Circuit Schematic
Protocol Vcc
Tx_Disable
Tx_Fault
Rx_LOS
VCC
SerDes ICProtocol IC
PLD / PAL
1uH
1uH
RES1
100 Ohms*
3.3V
0.1uF10uF
RES1
3.3V
RES1 RES1 RES1
RES1 = 4.7k to 10k Ohms
* Depands on SerDes IC used
0.1uF
Tx_Disable
Tx_Fault
TD +
TD -
VeeT
0.1uF10uF
RD +
RD -
Rx_LOS
VeeR
Mod_def 2
Mod_def 1
Mod_def 0
DELTA SFP Module
VccT
10k Ohms
0.01uF
100 Ohms
0.01uF
VccR
0.01uF
0.01uF
Laser Driver
Preamp &
Quantizer
EEPROM
Laser Diode
Photo Diode
DELTA ELECTRONICS, INC.
6 2008/1/23
Rev. 6G
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Package Outline Drawing
DELTA ELECTRONICS, INC.
7 2008/1/23
Rev. 6G
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SFP timing parameters for SFP management
Parameter Symbol Min. Max. Unit Note
TX_DISABLE Assert time t_off 10 μsec 1
TX_DISABLE Negate time t_on 1 msec 2
Time to initialize, including
reset of TX_FAULT
TX Fault Assert Time t_fault 100 μsec 4
TX_DISABLE to reset t_rest 10 μsec 5
LOS Assert Time t_loss_on 100 μsec 6
LOS Deassert Time t_loss_off 100 μsec 7
Serial ID Clock Rate f_serial_clock 100 kHz
Notes:
1) Time from rising edge of TX_DISABLE to when the optical output falls below 10% of nominal
Time from falling edge of TX_DISABLE to when the modulated optical output rises above 90% of
2)
nominal
From power on or negation of TX_Fault using TX Disable
3)
Time from fault to TX fault on.
4)
Time TX Disable must be held high to reset TX_Fault
5)
6) Time from LOS state to Rx LOS assert
7) Time from non-LOS state to Rx LOS deassert
t_init 300 msec 3
DELTA ELECTRONICS, INC.
8 2008/1/23
Rev. 6G
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Enhanced Digital Diagnostic Interface
The memory map in the following describes an extension to the memory map defined in SFP MSA. The enhanced
interface uses the two wire serial bus address 1010001X(A2h) to provide diagnostic information about the module’s
present operating conditions.
2 wire address 1010000 X (A0h) 2 wire address 1010001 X (A2h)
0 0
Alarm and Warning Thresholds
(56 bytes)
Serial ID Defined by SFP MSA
95
96 96
127
(96 bytes)
Vender Specific
(32 bytes)
55
56
Cal Constants
(40 bytes)
95
Real Time Diagnostic Interface
(24 bytes)
119
120
Vender Specific
127
128 128
Reserved in SFP MSA
255
Digital Diagnostic Memory Map Specific Data Field Descriptions
(128 bytes)
247
248
255
User Writable EEPROM
(120 bytes)
Vender Specific
(8 bytes)
DELTA ELECTRONICS, INC.
9 2008/1/23
Rev. 6G
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EEPROM Serial ID Memory Contents (2-Wire Address A0h)
Address Hex ASCII Address Hex ASCII Address Hex ASCII
00 03 43 2D - 86 DC
01 04 44 31 1 87 DC
02 07 45 32 2 88 DC
03 00 Note 1 46 35 5 89 DC
04 00 47 30 0 90 DC
05 00 48 42 B 91 DC
06 02 49 34 4 92 68
07 00 50 51 Q 93 B0
08 00 51 44 D 94 02
09 00 52 52 R 95 CS2 Note 8
10 00 53 20 96 00
11 03 54 20 97 00
12 0D 55 20 98 00
13 00 56 41 A 99 00
14 0A Note 2 57 20 100 00
15 64 Note 3 58 20 101 00
16 00 59 20 102 00
17 00 60 05 Note 4 103 00
18 00 61 1E Note 4 104 00
19 00 62 00 105 00
20 44 D 63 CS1 Note 5 106 00
21 45 E 64 00 107 00
22 4C L 65 1A 108 00
23 54 T 66 00 109 00
24 41 A 67 00 110 00
25 20 68 SN Note 6 111 00
26 20 69 SN 112 00
27 20 70 SN 113 00
28 20 71 SN 114 00
29 20 72 SN 115 00
30 20 73 SN 116 00
31 20 74 SN 117 00
32 20 75 SN 118 00
33 20 76 SN 119 00
34 20 77 SN 120 00
35 20 78 SN 121 00
36 00 79 SN 122 00
37 00 80 SN 123 00
38 00 81 SN 124 00
39 00 82 SN 125 00
40 4C L 83 SN 126 00
41 43 C 84 DC Note 7 127 00
42 50 P 85 DC 128 00 Note 9
Notes:
1) Byte 3~10: Code for electronic compatibility or optical compatibility.
2) Byte 14:Transmission distance in km
3) Byte 15: Transmission distance in 100m, distance >25.5km: FFh
4) Byte 60-61: The center wavelength of transmitter
5) Byte 63: Check sum of bytes 0-62.
6) Byte 68-83: Serial number.
7) Byte 84-91: Date code.
8) Byte 95: Check sum of bytes 64-94.
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9) Byte 128 to 255 had been set hex 00.
Digital Diagnostic Monitoring Interface
Alarm and Warning Thresholds (2-Wire Address A2h)
Address
00-01 2 Temp High Alarm TC (MAX.)+15
#
Bytes
Name Value (Dec.) Unit Note
℃
02-03 2 Temp Low Alarm TC (MIN.)
04-05 2 Temp High Warning T
06-07 2 Temp Low Warning T
08-09 2 Voltage High Alarm Vcc+5%
(MAX.)+10
C
(MIN.)+10
C
Volt
10-11 2 Voltage Low Alarm Vcc-5%
12-13 2 Voltage High Warning Vcc+3%
14-15 2 Voltage Low Warning Vcc-3%
16-17 2 Bias High Alarm I
18-19 2 Bias Low Alarm I
20-21 2 Bias High Warning I
22-23 2 Bias Low Warning I
24-25 2 TX Power High Alarm P+3
*2+20
OP
OP
*2+10
OP
OP
mA 2
-20
-10
dBm 3
26-27 2 TX Power Low Alarm P-3
28-29 2 TX Power High Warning P+2
30-31 2 TX Power Low Warning P-2
32-33 2 RX Power High Alarm P
34-35 2 RX Power Low Alarm P
36-37 2 RX Power High Warning P
38-39 2 RX Power Low Warning P
+3
0
S
+2
0
-2
S
dBm 4
40-45 16 Reversed
56-91 36 External Calibration Constants
92-94 3 Reversed
95 1 Checksum 5
96-97 2 Real Time Temperature
98-99 2 Real Time Supply Voltage
100-101 2 Real Time Tx Bias Current
102-103 2 Real Time Tx Optical Power
104-105 2 Real Time Rx Received Power
106-109 4 Reserved
110 1 Optional Status/ Control Bits 6
111 1 Reserved
112-119 8 Optional Set of Alarm and Warning 7
Notes:
1
: Case Operating temperature
1) T
C
2) I
: Operating current at room temperature. The min. setting current is 0 mA.
OP
3) P: Operating optical power of transmitter at room temperature.
4) P
: Overload optical power of receiver
0
P
: Sensitivity optical power of receiver
S
5) Byte 95 contains the low order 8bits of sum of bytes 0-94
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Page 12
6)
State/ Control Bits
Byte Bit Name Description
110 7 Tx Disable State Digital state of the Tx disable input pin
110 6 Soft Tx Disable Read/ Write bit that allow software disable of laser
110 5 Reserved
110 4 Rate Select tate NA
110 3 Soft Rate Select NA
110 2 Tx Fault Digital state of the Tx fault output pin
110 1 LOS Digital state of the LOS output pin.
110 0 Data_Ready_Bar NA
7)
Optional Set of Alarm and Warning
Byte Bit Name Description
112 7 Temp High Alarm Set when internal temperature exceeds high alarm level
112 6 Temp Low Alarm Set when internal temperature is below low alarm level
112 5 Vcc High Alarm Set when internal supply voltage exceeds high alarm level
112 4 Vcc Low Alarm Set when internal supply voltage is below low alarm level
112 3 Tx Bias High Alarm Set when Tx Bias current exceeds high alarm level
112 2 Tx Bias Low Alarm Set when Tx Bias current is below low alarm level
112 1 Tx Power High Alarm Set when Tx output power exceeds high alarm level
112 0 Tx Power Low Alarm Set when Tx output power is below low alarm level
113 7 Rx Power High Alarm Set when received power exceeds high alarm level
113 6 Rx Power Low Alarm Set when received power is below low alarm level
113 5-0 Reserved
116 7 Temp High Warning Set when internal temperature exceeds high warning level
116 6 Temp Low Warning Set when internal temperature is below low warning level
116 5 Vcc High Warning Set when internal supply voltage exceeds high warning level
116 4 Vcc Low Warning Set when internal supply voltage is below low warning level
116 3 Tx Bias High Warning Set when Tx Bias current exceeds high warning level
116 2 Tx Bias Low Warning Set when Tx Bias current is below low warning level
116 1 Tx Power High Warning Set when Tx output power exceeds high warning level
116 0 Tx Power Low Warning Set when Tx output power is below low warning level
117 7 Rx Power High Warning Set when received power exceeds high warning level
117 6 Rx Power Low Warning Set when received power is below low warning level
117 5-0 Reserved
Digital Diagnostic Monitor Accuracy
Parameter Typical Value Note
Transceiver Temperature
Power Supply Voltage ± 3% 2
TX Bias Current ± 10%
TX Optical Power ± 1.5dB
RX Optical Power ± 3dB
Notes:
1) Temperature is measured internal to the transceiver.
2) Voltage is measured internal to the transceiver.
DELTA ELECTRONICS, INC.
± 3℃
12 2008/1/23
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Regulatory Compliance
Test Item Reference Qty’
(#1)
Electromagnetic Interference
EMC
(#2) Immunity：
Radio Frequency
Electromagnetic Field
(#3) Immunity：
Electrostatic Discharge to the
Duplex SC Receptacle
(#4) Electrostatic Discharge to
the Electrical Pins
FCC Class B
EN 55022 Class B
CISPR 22
EN 61000-4-3
IEC 1000-4-3
EN 61000-4-2
IEC 1000-4-2
IEC 801.2
MIL-STD-883C
Method 3015.4
EIAJ#1988.3.2B
Version 2,
Machine model
Ordering information for SFP modules
Evaluation
5
5
(1) Satisfied with electrical characteristics of
product spec.
5
(2) No physical damage
5
LCP-1250B4QDRX1
X
: Temperature
1
Blank: -5 to +70 degree C
H: -10 to +85 degree C
T: -40 to +85 degree C
DELTA ELECTRONICS, INC.
13 2008/1/23
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